Salary: £50,000 - 70,000 per year Requirements: Significant commercial experience operating at senior developer level in both back-end and front-end areas Strong professional experience with C# and ASP.NET Strong experience in JavaScript, HTML, CSS, and React Knowledge of principles of writing mobile apps and deployment on Apple and Android app stores Experience in Visual C# and MVC Experience using GitHub for source control and collaboration Strong analytical and problem-solving skills both at a strategic and tactical level Strong SQL Server experience, including writing and optimizing production queries Confidence contributing to technical design and making informed trade-offs A pragmatic, calm approach when dealing with ambiguity or pressure Clear communication, including explaining technical constraints to non-technical stakeholders Nice to have: Experience with React Native Experience in writing automated unit tests using NUNIT Good understanding of waterfall, agile, and scrum development methodologies, and their practical application Experience in .NET 10 and other latest technologies including AI integration Experience in TypeScript Responsibilities: Design, develop, and maintain software within the ChemoCare product suite Own complex features or technical areas from design through to release Make sound technical decisions, escalating risks or trade-offs where appropriate Contribute to the technical direction of the product, balancing delivery with maintainability Work closely with QA to support effective testing and high product quality Write clear, maintainable, well-tested code aligned to agreed standards Review code and provide constructive, practical feedback Support and mentor less experienced developers as part of everyday team working Contribute to shared 3rd line support, investigating and resolving complex production issues when required Technologies: AI ASP.NET Android C# CSS GitHub Support JavaScript LESS Mobile MVC React React Native SQL TypeScript Fullstack More: At System C, we create technology that connects care and improves outcomes across the NHS. Our CIS Oncology (ChemoCare) product plays a critical role in supporting chemotherapy treatment management nationwide, and we are committed to investing in its safety, quality, and long-term evolution. We are looking for a Senior Full Stack Software Developer to join our R&D team as a hands-on individual contributor. You will work on software that genuinely matters, alongside a team that values collaboration, ownership, and integrity. We support flexible working, encourage reflective practice, and value those who are comfortable navigating change while keeping quality and patient safety at the forefront. Apply today and help us continue to deliver technology that supports better care across the NHS. last updated 18 week of 2026